NEC switch - Manual (Page 86)

CHAPTER 6 8-BIT TIMER/EVENT COUNTERS 00 AND 01
User’s Manual U12978EJ3V0UD
86
Figure 6-6. Interval Timer Operation Timing of 8-Bit Timer 00
Clear Clear
Interrupt acknowledged Interrupt acknowledged
Count starts
Interval time Interval time Interval time
Count clock
TM00 count value
CR00
TCE00
INTTM00
N 01 00 N 01 00 N 00 01
N N N N
t
Remark Interval time = (N + 1) × t where N = 00H to FFH
Figure 6-7. Interval Timer Operation Timing of 8-Bit Timer/Event Counter 01
Clear Clear
Interrupt acknowledged Interrupt acknowledged
Count start
Interval time Interval time Interval time
Count clock
TM01 count value
CR01
TCE01
INTTM01
TO01
N 01 00 N 01 00 N 00 01
N N N N
t
Remark Interval time = (N + 1)
× t, where N = 00H to FFH